Valve for steam-engines.



J. TRYSNA.

VALVE FOR STEAM ENGINES.

APPLICATION FILED .1UNE 20. 1914 Patented Sept; 14, 1915.

COLUMBIA PLANOGRAPH 50.,WASI1INGTON. D. c.

UNITED TATE PATENT @FFIQE.

JOSEF TRYSNA, 0F HAINDGRF, AUSTBIA HUNGARY, ASSIG-NOR T0 STEPHEN O. ADLER, 0F ALTOONA, PENNSYLVANIA.

VALVE FOR STEAM-ENGINES.

Specification of Letters Patent.

Patented Sept. 14, 1915.

Application filed June 20, 1914. Serial No. 846,409.

To all whom it M ay concern Be it known that I, Josnr TRYSNA, a subject of the Emperor of Austria-Hungary, residing in Haindorf, Bohemia, AustriaHungary, have invented certain new and useful Improvements in Valves for Steam-Engines, of which the following is a specification.

This invention relates particularly to valves for locomotive engines. IIeretofore slide valves have usually been employed for such engines, but I have produced improved mechanism in which valves of the puppet type are employed which when closed are much tighter than slide valves and not so apt to leak.

My improved valve mechanism is provided with means whereby the duration of the steam admission may be changed to suit various conditions, and I am thus enabled to economize in the use of steam.

In carrying out my invention I preferably equip a steam engine with two inlet valves, one at each end of the engine cylinder, and two exhaust valves similarly arranged. Both admission valves operate in a single steam chest and both exhaust valves operate in a chest which is common to them. These valves are of the puppet type, being closed by springs and opened by mechanism operated from a rock shaft disposed transversely with reference to the axis of the engine cylinder. The arrangement is such that when an admission valve is open at one end of the cylinder an exhaust valve is open at the op posite end and each admission valve is provided with devices by means of which the duration of its open period may be varied to govern the amount of steam admitted to the engine cylinder.

In the accompanying drawings: Figure 1 is a view, partly in vertical section and partly in side elevation of a portion of an engine cylinder, the exhaust valves and their actuating mechanism. Fig. 2 is a view partly in plan and partly in section of the engine cylinder and admission and exhaust mechanism. Fig. 3 is a view partly in vertical section and partly in elevation of a portion of the engine cylinder and the admission and exhaust mechanism connected therewith. Fig. 4 is a view partly in vertical section and partly in elevation of a portion of an engine cylinder and the admission valve mechanism connected therewith.

The steam cylinder A is provided with'a novel mechanism shown steam chest 6, receiving steam through a supply pipe B, and provided with seats for two. admission valves C, C. When the valves are opened steam passes from the steam chest I), through passages 0 to the one side of the cylinder and that there is an admission valve at each end of the other side of the same cylinder and between these valves is mounted in suitable bearings a rock shaft F, operated by suitable mechanism applied at f.

The exhaust valves are normally held on their seatsby springs (Z, arranged in suitable frames or housings I, and they are opened at the proper times by arms 9' extending in opposite directions from the rock shaft F and engaging levers h pivoted to the frames I and jointed to the valve stems (Z. As the shaft F is rocked the exhaust valves at opposite endsof the cylinder are alternately opened and closed.

The admission valves are operated by the particularly in Fig. 3. Each such valve has a valve stem Z extending up into the frame or housing L and pressed downward by a spring Z which" normally holds the valve on its seat. Devices Z serve to adjust the tension of the spring. To each valve stem is rigidly secured a block M provided on opposite sides with laterally projecting lugs m adapted to be engaged by latches N pivoted to the two branches 0 of an arm 0 projecting from the rock shaft F, as shown in Fig. 4. The latches are pressed toward the block M by springs 12, and when they engage under the lugs m as shown in Fig. 3, they serve to lift the admission valve when the rock shaft is turned in the proper direction. The latches N are provided with upwardly projecting arms at, adapted to engage a tripping device or block P which slides vertically on the valve stem and is connected by a link 79 with the frame L. It is also connected with a lever R by means of which it may be raised and lowered. This lever is under the control of the engineer who may er E by way of the lift and lower the block to the desired extent. As the shaft F rocks the exhaust valves are alternately opened by means of the arms 9 and levers h and the arms 0 operate to raise and lower the latches N. As the latches ascend they engage the lugs m of the block M, and as this block is rigidly fixed to the valve stem the valve is opened and will continue open as long as the latches, while ascending, engage the block. As soon, however, as the arms a of the latches engagethe tripping device P the latches-will be separated from the block M and the spring Z will cause the admission valve to close. By adjusting the position of the block or tripping device P the duration of the open period of the admission valve may be varied. Obviously ifthe tripping device P is ina lower position the valve will close sooner than otherwise. If the tripping device is in its highest position the valve will remain open during a longer period. It will therefore be understood that by this mechanism steam may be economized to a very great extent. The block or tripping device may be set to admit a definite quantity of steam at each stroke of the engine and when necessary this quantity or amount of steam may be varied to suit different conditions. The tripping device may be so adjusted as to prevent the opening of the admission valve when required so that in the case of a locomotive the latter may run by its own momentum.

I claim as my invention:

1. A steam engine cylinder provided with an admission valve and an exhaust valve at each end, means for alternately opening and closing the two exhaust valves, valve stems for the admission valves, means engaging V the admission valve stems for alternately openmg and closing the admlsslon valves,

tending from the admission valves, arms and means slidably. mounted on the stems of the admission valves for varying the duration of the open periods of said admission valves.

2. A steam engine cylinder provided with an admission valve and an exhaust valve at each end, a rock shaft disposed transversely to the axis of the cylinder, arms'projecting laterally from said rock shaft, levers engaged by said arms and which are operatively connected with the'exhaust valves to alternately open them, valve stems exprojecting laterally from the rock shaft, and carrying latches engaging the valve stems, and tripping devices for separating the latches from the valve stems.

3. A steam engine cylinder provided with admission and exhaust valves, means for opening and closing the exhaust valve, a

valve stem for the admission valve, a latch device, means for raising and lowering it, means for connecting the latch device with the valve stem, and an adjustable tripping device engaging the latch device at each 7 opening movement of the admission valve for varying the duration of its open period. 4:. In a steam engine an admission valve provided with a valve stem carrying a latch engaging member, a latch V cooperating therewith, means for raising the latch to open the admission valve, and a tripping device adjustable toward and from the valve seat engaging the latch to separate it from the valve stem and allow the valve to close. In witness whereof I have hereunto set my hand in the presence of two witnesses.

Josn'r TRYSNA.

Witnesses:

Aueos'r OOSTERMAN, FRANZ SIMON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents;

Washington, D. C. p V 

